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Solution structure of recombinant APETx1
Authors
Matsumura, K., Kobayashi, N., Kurita, J., Nishimura, Y., Yokogawa, M., Imai, S., Shimada, I., Osawa, M.
Assembly
Kappa-actitoxin-Ael2a
Entity
1. Kappa-actitoxin-Ael2a (polymer, Thiol state: all disulfide bound), 42 monomers, 4558.200 Da Detail

GTTCYCGKTI GIYWFGTKTC PSNRGYTGSC GYFLGICCYP VD


Formula weight
4558.2 Da
Entity Connection
disulfide 3 Detail

IDTypeValue orderAtom ID 1Atom ID 2
1disulfidesing1:CYS4:SG1:CYS37:SG
2disulfidesing1:CYS6:SG1:CYS30:SG
3disulfidesing1:CYS20:SG1:CYS38:SG

Source organism
Anthopleura elegantissima
Exptl. method
solution NMR
Refine. method
molecular dynamics
Data set
assigned_chemical_shifts
Chem. Shift Complete
Sequence coverage: 100.0 %, Completeness: 98.3 %, Completeness (bb): 96.8 % Detail

Polymer type: polypeptide(L)

Total1H13C15N
All98.3 % (454 of 462)99.1 % (232 of 234)97.8 % (181 of 185)95.3 % (41 of 43)
Backbone96.8 % (240 of 248)97.8 % (88 of 90)96.6 % (114 of 118)95.0 % (38 of 40)
Sidechain100.0 % (248 of 248)100.0 % (144 of 144)100.0 % (101 of 101)100.0 % (3 of 3)
Aromatic100.0 % (72 of 72)100.0 % (36 of 36)100.0 % (35 of 35)100.0 % (1 of 1)
Methyl100.0 % (32 of 32)100.0 % (16 of 16)100.0 % (16 of 16)

1. Kappa-actitoxin-Ael2a

GTTCYCGKTI GIYWFGTKTC PSNRGYTGSC GYFLGICCYP VD

Sample

Solvent system 90% H2O/10% D2O, Pressure 1 atm, Temperature 298 K, pH 6.0, Details 0.691 mM [U-100% 13C; U-100% 15N] APETx1, 20 mM potassium phosphate, 100 mM sodium chloride, 90% H2O/10% D2O


#NameIsotope labelingTypeConcentration
1APETx1[U-100% 13C; U-100% 15N]protein0.691 mM
2potassium phosphatenatural abundancebuffer20 mM
3sodium chloridenatural abundancesalt100 mM
4H2Onatural abundancesolvent90 %
5D2O[U-2H]solvent10 %

Protein Blocks Logo
Calculated from 20 models in PDB: 7BWI, Strand ID: A Detail


Release date
2020-09-08
Citation
Mechanism of hERG inhibition by gating-modifier toxin, APETx1, deduced by functional characterization
Matsumura, K., Shimomura, T., Kubo, Y., Kobayashi, N., Imai, S., Yanase, N., Akimoto, M., Yokogawa, M., Ikeda, I., Kurita, J., Nishimura, Y., Shimada, I., Osawa, M.
BMC Mol. Cell Biol. (2021), 22, 3-3, PubMed 33413079 , DOI 10.1186/s12860-020-00337-3 ,
Related entities 1. Kappa-actitoxin-Ael2a, : 1 : 2 : 2 : 23 entities Detail
Experiments performed 15 experiments Detail
Chemical shift validation 3 contents Detail
Keywords TOXIN